The indictment supersedes a case filed in June charging the duo with the hairdresser’s killing, which allows the case to proceed more quickly to trial.

Pre-trial dates were scheduled for Sept. 7 and Nov. 2.

Dressed in blue jail jumpsuits, Sementilli and Baker stood near each other inside the courtroom and were ordered to be held without bail by Los Angeles Superior Court Judge Sam Ohta.

Sementilli, whose attorney is Leonard Levine, is being housed at Century Regional Detention Facility in Lynwood. Baker, represented by Robert Kayne, is located at North County Correctional Facility in Castaic. Both attorneys and Deputy District Attorney Beth Silverman declined comment afterward.

The murder charge includes the special circumstance allegations of murder for financial gain and murder by means of lying in wait. Prosecutors will decide later whether to seek the death penalty against Monica Sementilli and Baker.

The conspiracy charge lays out details of the prosecution’s case against the two, with the indictment alleging that the pair agreed to kill her husband and planned to obtain her husband’s life insurance proceeds after the killing.

The indictment alleges that Monica Sementilli forwarded an e-mail to Baker about how to access her home video surveillance system, notified him that her husband would be alone on the afternoon of Jan. 23 and then left to go shopping to establish an alibi.

Baker and the “unknown co-conspirator” allegedly saw Sementilli sitting on the back patio and attacked him from behind, with Baker allegedly cutting himself on his left index finger, according to the indictment.

Baker allegedly “went into the kitchen to wash off the victim’s blood and destroy evidence, leaving his own blood behind” and attempted to stage a robbery and burglary in the master bedroom, the indictment alleges.

Monica Sementilli allegedly waited for her youngest daughter to arrive home to find her father’s body before returning to their home, and subsequently called a Los Angeles Police Department detective several times to inquire why her husband’s life insurance policy proceeds were being withheld.

The victim was pronounced dead by paramedics who responded to his home in the 5000 block of Queen Victoria Road.

Homicide detectives determined that Sementilli had been stabbed several times in the neck and upper body. The victim’s black 2008 Porsche 911 Carrera, which had paper plates, was missing.

The car was allegedly parked by Baker on Califa Street in Woodland Hills four hours after the killing, according to the indictment.

In June, Monica Sementilli’s attorney Levine told reporters his client was not involved in her husband’s killing.

Fabio Sementilli was an established hairdresser who served as vice president of education for Wella, the salon professional division of Procter and Gamble, according to Salon Today magazine.

City News Service and staff writer Wes Woods II contributed to this report.